首页|Intercritical Austenite Formation and Decomposition in the Coarse Grain Heat-Affected Zone of an X80 Line Pipe Steel
Intercritical Austenite Formation and Decomposition in the Coarse Grain Heat-Affected Zone of an X80 Line Pipe Steel
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NSTL
Springer Nature
Martensite-austenite constituents (M/A) decomposed from intercritical austenite in the coarse grain heat-affected zone (CGHAZ) affect the mechanical properties of welded steel pipelines. This work reports a quantitative investigation of intercritical austenite formation and its decomposition in the CGHAZ of an X80 line pipe steel through simulated welding thermal excursions, dilatometry, and metallography. The evolution of microstructure which involves austenite formation, a transformation stasis, and decomposition was revealed and used to rationalize the observation that only 0.05 to 0.1 M/A fraction is typically found in industrial welds.
TIANBI ZHANG、SABYASACHI ROY、SUDIPTA PATRA
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Centre for Metallurgical Process Engineering, The University of British Columbia, 309-6350 Stores Road, Vancouver BC V6T 1Z4, Canada
NSTL
Springer Nature
